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The total population of Onaka is estimated to be 22 with 10 males (45.45%) and 12 females (54.55%). There are 2 more females than males in Onaka.
In 2022, the population of Onaka was 14, a 0.00% decrease year-by-year from 2021. Previously, in 2021, Onaka's population was 14, a decline of 0.00% compared to a population of 14 in 2020.
The median age in Onaka, SD is 13.6, as per 2021 ACS 5-Year Estimates. Of the total population, 56.00% were under the age of 15, 0.00% aged 15 to 29, 20.00% aged 30 to 64, 24.00% aged 65 to 84, and 0.00% were 85 years of age and older.
Racial distribution of Onaka population: 100% are White.